Author Information

1Marian F. MacDorman and Fay Menacker are Statisticians in the Division of Vital Statistics, National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, Maryland; 2Eugene Declercq is a Professor in the Department of Maternal and Child Health, Boston University School of Public Health, Boston, Massachusetts; and 3Michael H. Malloy is a Professor in the Department of Pediatrics, University of Texas Medical Branch, Galveston, Texas, USA.